Saw.



UNITED STATES PATENT OFFICE.

ROBERT E. POINDEXTER, OF INDIANAPOLIS, INDIANA.

sAw.

.SPECIFICATION forming part of Letters Patent No. 693,312, datedFebruary 11 19(12. Application filed December 5, 1901. Serial No.84,831. (No model.)V

T0 all whom t may concern.-

Be it known that I, ROBERT E. POINDEX- TER, a citizen of the UnitedStates, residing at Indianapolis, in the county of Marion and State ofIndiana, have invented certain new and useful Improvements in Saws, ofwhich the following is a specification.

My said invention consists in certain improvements in the constructionof saws, particularly crosscut-saws, relating especially to the form andarrangement of the teeth, whereby a very efficient and easily-operatedsaw is provided, as will be hereinafter more fully described andclaimed.

Referring to the accompanying drawings, which are made a part hereof,andon which similar reference-numerals indicate similar parts, Figure 1 isa view of a crosscut-saw of my improved. pattern, sections between theends and middle portion being broken out to enable the parts to be shownon alarger scale, and Fig. 2 is a similar View of a modified form.

The improvement consists in the arrangement of the teeth, particularlyof the dragteeth, in relation to the cutting-teeth. In the form shown inFig. l the drag-teeth 1, each of which is a plain straight tooth, asshown, are arranged between sets of cutting-teeth, the first tooth ofeach set which follows said drag being a chisel-tooth 2 and the othersordinary cutting-teeth 3, preferably three in number in each set orgroup. `The center group has a chisel-tooth 2 at each end, and eachgroup from the center' toward each end of the saw has but onechisel-tooth, that being on the end of the group toward the end ofygathers these chips into the gullet in front of it. The chisel-toothfollowing is slightly longer than the drag-tooth and operates to cutinto the bottom of the kerf, gathering the chips in front of it in thegullet behind the drag-tooth and' leavinga clean kerf for the operationof the three cutting-teeth 3 which follow. The chips formed by thesethree teeth are gathered by the next drag-tooth in the gullet in frontof it. The front chisel-tooth of the next group cuts down and cleans thekerf behind the drag-tooth, gathering the chips in the gullet behind thedrag-tooth, as before. When the saw is dragged in the oppositedirection, the other end of the saw 0perates in the same manner, theprincipal portion of the work of a saw being done by the end draggedthrough the wood, as is well known. However, in the construction shownin Fig. 2 the operation described takes place throughout the entirelength of the saw regardless of the direction in which it is beingmoved. This arrangement insures a veryfast-cutting and clean-cuttingsaw, the chip capacity being much greater than in the ordinary ararangements.

Having thus fully described my said invention, what I claim as new, anddesire to secure by Letters Patent, is-` 1. A saw the teeth whereof arearranged in groups with a drag-tooth between said groups, the firsttooth of each group following said drag-tooth being a chisel-tooth, andsaid chisel-tooth being followed by ordinary cutting-teeth.

' 2. A saw having teeth arranged in groups with a drag-tooth betweenadjacent groups,

a deep gullet on each side of said drag-tooth,

and a chisel-tooth as the first tooth of the group following each ofsaid drag-teeth, substantially as set forth.

3. A saw havingits teeth arranged in groups with a drag-tooth betweenadjacent groups, the first tooth of each group following the drag-toothbeing a chisel-tooth andA slightly longer than said drag-tooth,substantially as set forth.

In witness whereof I have hereunto set my hand and seal, atIndianapolis, Indiana, this 25th day of November, A. D. 1901.

ROBERT E. POINDEXTER. [L S.]

Witnesses:

H. E. SMooK, W. O. WILLIAMS.

